Seas Pareto floorstanding loudspeaker in Hobby HiFi 3/2010

Kit without housing Price per speaker

Pareto is a floor-standing loudspeaker that uses Seas chassis. To keep the price of the 3-way speaker affordable, Bernd Timmermanns chose a slightly higher crossover frequency between the speakers. This makes the crossover components for the woofer and midrange speaker (coil, capacitor) cheaper. Due to the higher crossover frequency, the midrange speaker has to produce less bass: a smaller chassis can therefore be used. Since the two woofers connected in parallel would be too loud compared to the midrange speaker, the woofers were connected in series.

Technical data:

• Impedance: 8 Ohm 
• Sound pressure level (2.83V/1m): 88 dB
• Dimensions (HxWxD): 1100 x 220 x 300 mm 
• Frequency range (-8dB): 48 - 33000 Hz
• Frequency range (-3dB): 50 - 30000 Hz 
• Crossover frequencies: 450, 2600 Hz 
• Principle: bass reflex box

Highlights

• Seas tweeter 22 TAF/G 
• Seas midrange MCA 12 RC 
• 2 Seas woofers WA 180 
• Bass reflex tube HP100
  
• 2.5 packs of Bondum 800 insulation fleece
• PE sealing strip
• 1.5 packs of polyester wadding insulation material
• Pair of pole terminals made of gold-plated brass
• 4m speaker cable 2x2.5 mm2, transparent
• 24 pan screws 4x20mm 
• 2 grid plates LP/RA140
• the construction plan for the kit the crossover components: 
• Electrolytic capacitor, smooth 15uF / 70Volt
• Electrolytic capacitor, smooth 33uF / 70Volt
• MKP capacitor 4.7uF / 400V 
• MKP capacitor 10uF / 400V
  
• MKP capacitor 33uF / 400V
• Air coil 0.27 mH / 0.7 mm
  
• Air coil 1.0 mH / 1.0 mm
• 0.5 mm tube core coil 4.7 mH/2.31 Ohm
• H-core coil H71 8.2 mH / 0.8 Ohm 
• MOX10 resistor 1.0 Ohm/10Watt (brown-black-gold) 
• MOX10 resistor 2.2 Ohm/10Watt (red-red-gold)

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